wants_controller_spec.rb

  describe "PUT want" do
    it "should add selected items to want list" do
      item = Factory(:item)
      expect {
        put :want, :item_ids => [item.id]
      }.to change(Want, :count).by(1)
      response.should redirect_to(auction_house_auction_path(item.auction.auction_house.id, item.auction.id))
    end
  end